[PATCH] Call SetVirtualAddressMap() by default

[Demi Marie Obenour <demi@xxxxxxxxxxxxxxxxxxxxxx>]

To quote Andrew Cooper:

> I know we've had this argument before, but not calling
> SetVirtualAddressMap() isn't a viable option.  It's a prerequisite to
> function on literally millions of devices

Qubes OS has been shipping EFI_SET_VIRTUAL_ADDRESS_MAP for years, and I
believe OpenXT and EVE ship it as well. Mark EFI_SET_VIRTUAL_ADDRESS_MAP
as SUPPORTED and enable it by default.

Signed-off-by: Demi Marie Obenour <demi@xxxxxxxxxxxxxxxxxxxxxx>
---
What is necessary for this patch to be accepted?

 xen/common/Kconfig | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/xen/common/Kconfig b/xen/common/Kconfig
index 
f1ea3199c8ebdc1e9d0968b9de007f4df44bac79..5b8edb6d81a1296969f968702c5e7f2c775ceba9
 100644
--- a/xen/common/Kconfig
+++ b/xen/common/Kconfig
@@ -215,14 +215,15 @@ config KEXEC
          If unsure, say Y.
 
 config EFI_SET_VIRTUAL_ADDRESS_MAP
-    bool "EFI: call SetVirtualAddressMap()" if EXPERT
+    bool "EFI: call SetVirtualAddressMap()"
+    default y
     ---help---
       Call EFI SetVirtualAddressMap() runtime service to setup memory map for
       further runtime services. According to UEFI spec, it isn't strictly
       necessary, but many UEFI implementations misbehave when this call is
       missing.
 
-      If unsure, say N.
+      If unsure, say Y.
 
 config XENOPROF
        def_bool y
-- 
Sincerely,
Demi Marie Obenour (she/her/hers)
Invisible Things Lab